39.When Lily came home at 5 p.m. yesterday, her mother _____dinner in the kitchen.

21.He is the only Chinese who has ever won the award.

20.It was a hard job, but he did not mind.

19.It is well known that coal is an important source of energy.

18.He has a foreign friend who lives in the United States.

17.Could you tell me where the post office is?

16.A friend of mine from high school is working in England now.

15.Let's try something different.

14.I'll have to try using the search engines.

13.He is the only Chinese who has ever won the award.

12.The People's Republic of China (PRC), founded on October 1, 1949, covers an area of 9.6 million square kilometers.